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- adffbac6-6ba0-4191-b80c-628fd42c6fe7 definition "A neutron probe is not measuring water content directly. It is measuring hydrogen atoms and these can be from any source, including bound water and hydrocarbons. The use of a neutron probe in environmental, or environmental remediation applications usually requires frequent site recalibration due to changes in the hydrogen provided by sources other than water. In addition, a neutron probe is not accurate within the top 15 cm. of the soil surface due to neutron loss from the region of influence into the atmosphere. The user of a neutron probe usually requires special training, and a government license for transport, ownership and use of a radioactive source. The soil core from the probe borehole must be gravimetrically analyzed to establish a calibration reference curve to insure probe accuracy, and the site calibration curve is specific to a particular probe. Additionally, neutron probes 'age' with use as the activity level of the source degrades. This 'aging' of the probe requires periodic site recalibration to maintain accuracy. Additional information available at 'http://www.esica.com/products/moisture/tech.htm' [Summary provided by ESI]" @default.
- adffbac6-6ba0-4191-b80c-628fd42c6fe7 id "1655309" @default.
- adffbac6-6ba0-4191-b80c-628fd42c6fe7 path_id b2140059-b3ca-415c-b0a7-3e142783ffe8 @default.
- adffbac6-6ba0-4191-b80c-628fd42c6fe7 path_id def72d78-3c2f-4f46-91e7-259a0e63e2de @default.
- adffbac6-6ba0-4191-b80c-628fd42c6fe7 path_id ff564c87-78f2-47eb-a857-a4bdc0a71ae5 @default.
- adffbac6-6ba0-4191-b80c-628fd42c6fe7 path_label "In Situ/Laboratory Instruments" @default.
- adffbac6-6ba0-4191-b80c-628fd42c6fe7 path_label "Instruments" @default.
- adffbac6-6ba0-4191-b80c-628fd42c6fe7 path_label "Probes" @default.
- adffbac6-6ba0-4191-b80c-628fd42c6fe7 prefLabel "NEUTRON PROBE" @default.
- adffbac6-6ba0-4191-b80c-628fd42c6fe7 reference "" @default.
- adffbac6-6ba0-4191-b80c-628fd42c6fe7 tag "Instruments" @default.